From scholastic to sepulchral - now under reconstruction.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

One of the last Jazz Age "Wonder Theaters" in New York City.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

A very classy 1920s-era bar right in Grand Central Station.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A celebration of capitalism in Midtown.

The "Seinfeld" diner.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

New York City's smallest piece of private property.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A hands-on traveling collection of the innovative devices of yesteryear.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

A dilapidated dock tells the story of Titanic's missed arrival.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

A semi-scholarly approach to sex.

Elevated freight railway turned wildly successful urban park.